He has penned a two-year deal at his new club and will wear the number 17 shirt.
Sahin has struggled in recent seasons due to injuries but has been offered a fresh start by new manager Florian Kohfeldt.

“The talks with the owners and the coach were very good,” Sahin told the club’s official website. “Werder are a big club, where you have the feeling something is growing. I’m looking forward to being part of it.”

Kohfeldt said: “I don’t think there’s much more to say about the qualities of Nuri. He has experienced almost everything in the Bundesliga, been a champion and cup winner with Dortmund and played for Real Madrid and Liverpool.

“He has the potential to improve us further and gives us more options.”